# Docker Security Best Practices
Status: public
Confidence: medium (0.725) (verified)
Last verified: 2026-06-01
Generation: human_only


## TL;DR

Docker security starts from the fact that containers share the host kernel. AI agents should treat Dockerfile edits as security-sensitive changes, especially when changing base images, user privileges, dependency installation, or runtime capabilities.

## Core Explanation

Container isolation is useful, but it is not the same as a full virtual machine boundary. Docker documentation emphasizes the shared-kernel model. Build guidance also encourages minimal images and multi-stage builds, which reduce unnecessary runtime contents.

Rootless mode can reduce the risk of running the Docker daemon and containers as root, but it is not a universal substitute for image review, secret management, vulnerability scanning, and runtime policy.

## Detailed Analysis

When an AI coding agent edits a Dockerfile, it should produce a reviewable diff and call out:

- base image and tag or digest;
- whether the final runtime stage contains build tools;
- whether the container runs as root;
- what ports and filesystem paths are exposed;
- where secrets enter the build or runtime;
- how the image will be scanned and deployed.

For game servers, video workers, and AI inference services, the same rule applies: keep the runtime image small, explicit, and reproducible. If the agent cannot verify a dependency or base image, it should mark that as a review item rather than silently upgrading.

## Further Reading

- [Docker Engine security](https://docs.docker.com/engine/security/)
- [Docker build best practices](https://docs.docker.com/build/building/best-practices/)
- [Docker rootless mode](https://docs.docker.com/engine/security/rootless/)

## Related Articles

- [Container Orchestration](/computer-science/container-orchestration-kubernetes-architecture-scheduling-and-service-mesh/)
- [OAuth 2.0: Authorization Framework and Security Best Practices](/computer-science/oauth-2-0-authorization-framework-and-security-best-practices/)
- [Code Review Best Practices](/computer-science/code-review-best-practices/)